Sickle cell anaemia is controlled by the gene Hb. $Hb^{A}$ is the allele for normal blood. $Hb^{S}$ is the allele for sickle cell anaemia. Which pair of parents could produce some children who are resistant to malaria and some who have all normal red blood cells?
- A$Hb^{A} Hb^{A}$ and $Hb^{A} Hb^{A}$
- B$Hb^{A} Hb^{A}$ and $Hb^{A} Hb^{S}$
- C$Hb^{A} Hb^{A}$ and $Hb^{S} Hb^{S}$
- D$Hb^{S} Hb^{S}$ and $Hb^{S} Hb^{S}$